annual overhauling and emergency repair of steam generating units at cpp; 1 cleaning of furnace water wall and roof tubes 2 cleaning of secondary super heater coils 3 cleaning of primary super heater coils 4 cleaning of economiser banks including hoppers 5 cleaning of pent house 6 overhaul of drum internals followed by ibr and obtaining revalidation of boiler certificate from boiler inspector 7 de-meter survey of economiser coils with ut guage at various points / locations 8 de-meter survey of primary super heater coils with ut guage at various points / locations 9 de-meter survey of secondary super heater coils with ut guage at various points / locations 10 removal of old shrouds in economiser banks and refixing 11 skin plate gas cutting 12 skin plate welding 13 insulation removal and refixing 14 fixing of refractory 15 socket welded joints in boiler and auxiliaries area 16 butt welded joints in boiler and auxiliaries area 17 laying of pipe 18 overhauling of super heater safety valve 19 ovrhauling of boiler drum safety valve 20 overhauling of super heater erv and its pilot valve 21 overhauling of hp valvesize: 8 to 10 22 overhauling of hp valvesize: 4 to 6 23 overhauling of hp valve size: 2 to 3 24 replacement of gland packings / hp valves size: 1 to 2 1/2 25 radiography of weld joints 26 hydro testing of boiler 27 liasoning with boiler inspector for visit and witness of boiler hydro testing 28 assistance in actuator overhauling and hand survey of economiser coils 29 sky climber bottom platform erection inside boiler furnace 30 sky climber erection, testing and operation inside boiler furnace 31 cleats replacement and coil alignment 32 economiser tubes and bends weld joints 33 secondary super heater, primary super heater, water wall, roof header tube and bends weld joints 34 clevis pins replacement 35 supply and replacement of boiler drum door gaskets type - champion style 54 super metallic grade as per technical specification 36 emergency tube repair in secondary super heater coils, water wall tubes and furnace roof tubes etc., upto 15 joints including scaffolding arrangement, sky climber erection and hydro testing 37 emergency tube repair in economiser and primary super heater upto 15 joints including preparatory jobs and hydro testing 38 erection of temporary platforms / scaffolding arrangement at secondary super heater area 39 erection of temporary platforms and scaffolding arrangement at primary super heater / economiser bottom bank area 40 hfo heater overhauling 41 boiler license renewal fees 42 steam pipe line testing